When built and run under address sanitizer (asan), `mj_markStack` and `mj_freeStack` are instrumented to detect leakage of mjData stack frames. When the compiler inlines several callees that call into mark/free in the same function, this instrumentation requires that the compiler retains separate mark/free calls for each original callee.
This change adds necessary optimization barriers to ensure that this is the case.
PiperOrigin-RevId: 609373993
Change-Id: I30dfd998fb66530735348e9715d92ee713f28210
Yuval Tassa